Ayu
- kingdom: Animalia
- phylum: Chordata
- class: Actinopterygii
- order: Osmeriformes
- family: Plecoglossidae
- genus: Plecoglossus
- species: Plecoglossus altivelis
Nagoya-shi
Aichi
Atsugi
Kanagawa
Matsushima
Miyagi
Okayama-shi
Okayama
Japan
Ayu
Nagoya-shi
Atsugi
Matsushima
Okayama-shi